2009 Mathematics Puzzle
For students in grades 3-12 with a general knowledge of mathematics. Use the digits in the year 2009 and the operations +, -, x, ÷, ^ (raised to a power), sqrt (square root), and ! (factorial), along with grouping symbols, to write expressions for the
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2010 Mathematics Puzzle
For students in grades 3-12 with a general knowledge of mathematics. Use the digits in the year 2010 and the operations +, -, x, ÷, ^ (raised to a power), sqrt (square root), and ! (factorial), along with grouping symbols, to write expressions for the
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21st Century Educator - David Wees
Wees serves as the learning specialist for information technology at Stratford Hall (Vancouver, BC). His blog posts, which date back to November, 2008, have included "Creating a WiiMote interactive white board at my school for under $50," "Eight Videos
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21st Century Problem Solving - Howard C. McAllister
Examples of problems solved using reliable problem solving methods; discussion of the principles of reliable problem solving; a FAQ; and an evolving encyclopedia of solved problems in mathematics, physics, and chemistry. The main focus is on pre-college
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The 24 Game - Suntex International Inc.
A site showing all the editions, challenge rules, tips, hints, and more about the 24 Game. Designed for all ages, play proceeds by creating the number 24 from the four numbers on a game card using addition, subtraction, multiplication, or division. Watch
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24 Theory
This "hobby website" offers JavaScript that calculates, enumerates, and displays all distinct solutions and solvable scenarios to the popular arithmetic card game, as well as interactive tables. 24theory.com also provides an online version of the 24 game
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3.1415926... - TWO-N, INC.
This visualization of the first four million decimal digits of π shows each of the digits 0-9 as a different colored pixel. Slide the navigator down to see the numeric "snow" representing the digits 500,001 through 4,000,000; search for any number
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360 Degree Math - Sean Kavanaugh
"What if there was a way to make the thinking of each student visible to the teacher throughout the lesson?" 360 Degree Math classes begin with the teacher personally greeting each student as she enters the classroom ("The Exchange"); students solving
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3-D and SIRDS images - Jonathan Bowen
An archive of single image random dot stereo (SIRDS) and other 3-D images, together with related information and software. It is available via anonymous FTP. Plain text information on frequently asked questions concerning SIRDS, an index and a README
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3-D Drawing and Geometry - Cathi Sanders
A Math Forum Summer 1998 Institute project that uses examples of paintings, architecture, etc. to analyze different types of 3-D drawings, and teaches students how to create them. Careers in 3-D drawing that use these techniques, from architecture to
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3D Nauta
A three-dimensional spatial, topological problem/game with Web interfaces in Spanish, French, and English. Of two versions of the game, one is accessible
to most people, while the other can be made difficult exponentially. You are invited to order your
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The 3n +1 Problem - Darrell Cox
A probabilistic approach to the Collatz conjecture. With references to continued-fraction convergence of log(3)/log(2), m-cycles, and other classical approaches to the 3n + 1 problem, as well as the MSVC++ C code that confirmed many of Cox's propositions.
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42eXplore - Annette Lamb and Larry Johnson
Web projects that offer definitions, activities, four good starting points, and many more links and resources for thematic topics such as charts and graphs; codes, ciphers and secret messages; fractals, tessellations, geometric shapes, and figures; number
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5½ Examples in Quantum Mechanics - Tom Kirkman
An informal textbook, introducing quantum mechanics with a grounding in classical mechanics. It tries to formulate problems in ways that allow easy translation into Mathematica code. Sets of problems at the end of each "chapter" provide extentions of
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82 Games - Roland Beech
In-depth statistical coverage and analysis of the National Basketball Association (NBA). The site analyzes team-wide or player-specific shot selection and shot clock usage, production by position, player pairings, foul drawing, turnovers, and clutch play
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8 Foxes
A blog in which geometry questions of different levels are posted daily.
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8 is Great: Math Games
Addition, multiplication, and division practice at the elementary level. Tips and tricks offered for 9 and 11 times tables, factoring a quadratic expression, and generating the Fibonacci sequence. Also includes a sudoku puzzle.
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